test(coverage): batch 5–8 — Rust unit tests toward 80% for 20 modules

[CodeGhost21]

Summary

• Adds 244 new unit tests across 20 Rust modules to push line coverage from 75.06% → 75.70% overall
• Moves 20 modules above the 80% line coverage threshold
• All 3,974 tests pass (up from 3,730 before this PR)

Modules improved:

Module	Before	After
api/socket	77%	100%
rpc/dispatch	75%	100%
config/schema/channels	77%	100%
composio/gmail/sync	78%	97%
composio/notion/sync	77%	96%
webhooks/router	78%	96%
agent/hooks	78%	92%
config/schema/proxy	76%	90%
local_ai/device	79%	89%
text_input/schemas	73%	89%
agent/harness/interrupt	76%	88%
billing/schemas	79%	87%
screen_intelligence/schemas	78%	81%
about_app/types	71%	80%+
health/schemas	72%	80%+
app_state/schemas	72%	80%+
core/types	53%	80%+
config/schema/identity_cost	74%	80%+
cron/scheduler	79%	80%+

What's tested:

• Schema catalog integrity (count, namespace, description)
• Param deserialization (valid, invalid, edge cases)
• Serde roundtrips (JSON, TOML)
• Pure helper functions (sanitize, normalize, parse)
• Error paths and edge cases
• Webhook router lifecycle (register, unregister, persist, logs)
• Cron scheduler helpers (one-shot, env assignment, quote stripping, delivery modes)

Test plan

• cargo test --lib — all 3,974 tests pass
• cargo fmt --all --check — clean
• cargo check — clean
• Pre-push hooks pass (prettier, eslint, tsc, cargo check)

Closes #530 (partial — continues coverage push toward 80% target)

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 33cb2ffb-22f6-4fab-a8d7-eff92ffa248b

📥 Commits

Reviewing files that changed from the base of the PR and between a78506f and 8ef518a.

⛔ Files ignored due to path filters (2)

• Cargo.lock is excluded by !**/*.lock
• app/src-tauri/Cargo.lock is excluded by !**/*.lock

📒 Files selected for processing (25)

• src/api/socket.rs
• src/core/types.rs
• src/openhuman/about_app/types.rs
• src/openhuman/agent/harness/interrupt.rs
• src/openhuman/agent/hooks.rs
• src/openhuman/app_state/schemas.rs
• src/openhuman/billing/schemas.rs
• src/openhuman/channels/controllers/schemas.rs
• src/openhuman/composio/providers/gmail/sync.rs
• src/openhuman/composio/providers/notion/sync.rs
• src/openhuman/config/schema/channels.rs
• src/openhuman/config/schema/identity_cost.rs
• src/openhuman/config/schema/proxy.rs
• src/openhuman/cost/tracker.rs
• src/openhuman/credentials/profiles.rs
• src/openhuman/cron/scheduler.rs
• src/openhuman/health/schemas.rs
• src/openhuman/local_ai/device.rs
• src/openhuman/memory/conversations/store.rs
• src/openhuman/screen_intelligence/schemas.rs
• src/openhuman/text_input/schemas.rs
• src/openhuman/tools/impl/browser/browser_open.rs
• src/openhuman/tools/impl/filesystem/update_memory_md.rs
• src/openhuman/webhooks/router.rs
• src/rpc/dispatch.rs

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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